Brush construction



Feb. 13, 1940. w. c. BEAMES BRUSH coNsTnucTIoN and April 1.6. 1938 W-q 11L ATTORNEY Patented Feb. 13, 1940 1,.

BRUSH CONSTRUCTION Walden G. Beames, River Edge, N. .L, assignor to Devoe & Raynolds 00., Inc., a corporation of New York Application April 16, 1938, Serial No. 202,459 2 Claims. (01. 15-204) My invention relates to an improved construction of brush, particularly an improved kalsomine brush.

A constant problem in the brush making art 5 is the undue swelling of bristles in water. The

total swelling may be considerable. In the ordinary kalsomine brush the swelling causes the bristles to bulge outwardly above the rim of the ferrule. As a consequence, the alignment of the ends of the bristles at the edge of the brush is definitely and permanently impaired.

In a brush constructed in accordance with my invention, swollen bristles cannot impair the working edge of the brush. By utilizing the ele-' ments of my invention, the increase in the diameter of the bristles is substantially diverted inwardly and the ferrule is so constructed that any tendency of the bristles to bulge outwardly is resisted without impairment of the working edge. The drawing shows a preferred form of kalsomine brush embodying the invention.

Fig. 1 is a front elevation of a brush;

Fig. 2 is a side elevation of the brush shown in Fig. 1;

Fig. 3 is an enlarged fragmentary cross secv tion taken on the line 33 of Fig. 1; and

Fig. 4 is a cross section taken on the line 4-4 of Fig. 3.

Describing now the invention with reference particularly to the kalsomine brush shown in the drawing, H3 is a-brush handle equipped with a wide, flat ferrule I 2, from which the brush bristles project in two wide layers I l-I4, said bristle layers being anchored within the ferrule with the plug l6 between their inner faces. The basal ends of the bristles of these layers It are anchored in a suitable composition l8, preferably a vulcanized rubber compound made and applied in accordance with the usual brush construction. The rim portion of the ferrule I2 bears against the outer faces of the bristle layers above their anchorage in the composition l8. The outer end of the plug I6 is located at a level below the rim of the ferrule. The plug is made of a material such as vulcanized rubber as distinguished from wood, which does not swell in the presence of water. The faces of the plug i6 converge from the base of the plug toward its outer end. The anchoring composition l8, as already pointed out is below the rim portion of the ferrule so that said rim portion can bear against the bristles and not against the composition l8. At the plug, this composition extends to a level above the outer end of the plug but not substantiallyabove the rim of the ferrule. t

The walls of the ferrule at the outer faces of the bristle layers M are inwardly thickened, as by having said walls bent inwardly and downwardly to form the inwardly located'rim portions I 2a.

These direct the bristles inwardly and they also 5 increase the bulge-resisting strength of the ferrule so that it is not overcome by the swelling of the bristles. i

Rivets 20 extend through the walls of theferrule [2 and through the contained composition- 10 anchored ends I 8 of the bristle layers and through the plug l6, thereby securely binding together all of said parts as shown, and preventing outward bulging of the ferrule.

The illustrated and described improvements 15 prevent the thickened water-saturated bristles from bulging outwardly at the ferrule and spoiling their proper meeting at the edge of the brush. The improvements cause the thickened bristles to make room for themselves inwardly of the brush 20 instead of bulging outwardly. This inward expansion of the bristles is brought about by the ferrule being high relatively to the plug and relatively to the composition in which the bristles are set, so that the rim portion of the ferrule bears against the bristles abovetheir anchorage in the composition, the low set plug offering no barrier to this inward expansion. Being nonabsorbent, the plug itself does not swell, thereby eliminating any outward bulging of the ferrule and bristles from that source. The bristles are also pressed inwardly by the hem or inward thickening l2a of the rim portion of the ferrule. The hemmed ferrule, having more than twice 35 the bulge-resisting strength of a non-hemmed ferrule, provides a stiff resistance to the swelling bristleaand being relatively high, directs the swelling inward. The bristle shanks are directed by the foregoing to a well toed-in working-edge 40 improving form-retention during use of the brush and promoting free-flexing action. The limit-' ing of the bristle anchoring-composition It to a level well within the ferrule permits free flexing of the bristles and allows the ferrule to direct 45 the bristles inwardly and to function as set forth.

I claim:

1. A kalsomine brush comprising a handle, a ferrule mounted on said handle, a recess formed by the walls of said ferrule and the base of said 50 handle, filling for said'recess comprising a setting composition capable of receiving and retaining .bristle ends, bristles anchored at their basal ends in said setting composition, a tapered, non-absorptive plug having outwardly converg- 55 10 below the outer "end of the ferrule, and means ing longitudinal sides set in said setting composition and dividing the bristles into a plurality of bristle layers, the plug being set in said setting composition so that the base of the plug is exposed and the horizontal plane of the base of the plug is substantially lower than the surrounding walls of the setting composition thereby forming a secondary recess, the horizontal .plane of the base of said :plug also belng substantially for holding the setting composition within the ferrule.

2. A brush as claimed in claim 1 in which the outer level of the setting composition at one point is substantially on the same plane with the outer end of the ferrule: the exposed base of the plug being substantially below the plane of the outer end of the ferrule and the outer level of the setting composition.

WALDEN C. BEAMES. 

